Current study. The investigators received NIDA funding to conduct a randomized clinical trial with 325 clients entering a residential substance use treatment facility. Study participants will be randomized into two treatment groups: (1) those receiving SIDI and (2) those receiving Supportive Counseling (SC). Participants will receive 10 treatment sessions over a period of 4 months. Then, the investigators will follow clients for one year to examine treatment retention and abstinence.